Selection of tomato genotypes for drought tolerance and agronomic potential through different selection indexes

Abstract

The selection of genotypes with agronomic potential associated with drought tolerance is considered of high complexity. An alternative could be the use of selection indexes that can evaluate multiple characteristics simultaneously. This study aimed to select tomato genotypes with agronomic potential and drought tolerance by selection indexes. The experiment was conducted in a randomized block design with three replications. Ten treatments were evaluated: seven genotypes F2RC3, donor genitor (Solanum pennellii), recurrent genitor (UFU-040), and cv. Santa Clara. The irrigation was suspended until the substrate reached a matric potential of ≤-25 kPa for water stress simulation during the tomato cycle at 45, 60, 80 and 100 days after sowing. The control treatment (donor genitor) and cv. Santa Clara, were resistant and susceptible to water deficit, respectively. The UFU-102-RC3#91335 genotype presented agronomic potential and satisfactory tolerance level to water deficit and presented 58.2% higher production than the recurrent genitor (UFU-040). The genotype-ideotype distance selection index was the most appropriate for the selection of tomato genotypes for agronomic potential allied to drought tolerance.

Artificial neural networks and genetic dissimilarity among saladette type dwarf tomato plant populations

“…It has been reported that tomato plant characteristics should be prioritized to obtain future cultivars, especially with regard to the various biotic ( Ferrero et al, 2020 , Zanin et al, 2021 ) and abiotic stressors ( Oliveira et al, 2021 , Wen et al, 2021 ), as well as the nutritional quality of the fruit ( Londoño-Giraldo et al, 2020 , Gomes et al, 2021 , Oliveira et al, 2022 ) for a healthy diet ( Asensio et al, 2019 ). A major obstacles to this is the narrow genetic base of the tomato germplasm ( Hassan et al, 2021 ).…”

Selection for drought tolerance in backcross populations derived from interspecific crosses of Solanum lycopersicum × Solanum pennellii

“…Moreover, seed germination and initial seedling stages are critical for plant establishment and development under drought and, thus, represent an important selection step (Mishra et al, 2016). In addition, morphophysiological traits, such as growth, water balance and gas exchange parameters, are major indicators of plant tolerance to drought in adult plants (Dariva et al, 2020; Galmés et al, 2013; Oliveira et al, 2021; Xiong & Nadal, 2020). Relative water content (RWC) reflects the water balance of plants, being a reliable indicator for drought tolerance (Patanè et al, 2016).…”